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Cups to Grams: Rolled Oats (Old Fashioned) Conversion Calculator | MiniCalci

Convert rolled oats (old fashioned) from cups to grams and grams to cups. 1 cup of rolled oats equals 90g (3.17 oz). Free conversion table & tips.

Density varies by ingredient, so grams per cup is different for each

Decimal cups are fine, e.g. 0.5 or 1.33

Rolled Oats (Old Fashioned) Cups to Grams Conversion

Converting rolled oats (old fashioned) between US cups, grams, and ounces requires knowing its specific ingredient density. Unlike water (where 1 cup = 236.6g), dry and baking ingredients vary widely.

Key Rolled Oats Measurement Rule

1 standard US Cup of Rolled Oats (Old Fashioned) = 90 grams (3.17 oz)
1 Tablespoon = 5.6 grams

Rolled Oats Conversion Chart (Cups to Grams & Ounces)

Use this quick-reference table for common recipe fractions of rolled oats (old fashioned):

Volume (US Cups) Weight (Grams) Weight (Ounces)
1/8 cup (2 tbsp) 11 g 0.4 oz
1/4 cup (4 tbsp) 23 g 0.79 oz
1/3 cup 30 g 1.06 oz
1/2 cup (8 tbsp) 45 g 1.59 oz
2/3 cup 60 g 2.12 oz
3/4 cup (12 tbsp) 68 g 2.38 oz
1 cup (16 tbsp) 90 g 3.17 oz
1 1/4 cups 113 g 3.97 oz
1 1/2 cups 135 g 4.76 oz
1 3/4 cups 158 g 5.56 oz
2 cups 180 g 6.35 oz
2 1/2 cups 225 g 7.94 oz
3 cups 270 g 9.52 oz

Reverse Conversion: Grams to Cups (Rolled Oats)

If you are following a recipe written in metric grams but only have cup measuring sets:

Weight (Grams) Equivalent Cups Approximate Kitchen Measure
25 g 0.28 cups 1/4 cup (4 tbsp)
50 g 0.56 cups 0.56 cups
75 g 0.83 cups 0.83 cups
100 g 1.11 cups 1.11 cups
125 g 1.39 cups 1.39 cups
150 g 1.67 cups 1.67 cups
200 g 2.22 cups 2.22 cups
250 g 2.78 cups 2.78 cups
300 g 3.33 cups 3.33 cups
400 g 4.44 cups 4.44 cups
500 g 5.56 cups 5.56 cups

How to Correctly Measure Rolled Oats

Quick oats pack slightly tighter at ~95–100g per cup. Steel-cut oats are much denser at ~160g per cup.

Culinary Notes & Baker's Tips

Used extensively in oatmeal, granola, crisps, and baking. 1 cup of rolled oats provides about 300 calories and 10g of protein.

Explore Other Ingredient Conversions:

Flour (120g/cup) Granulated Sugar (200g/cup) Brown Sugar (220g/cup) Powdered Sugar (120g/cup) Almond Flour (96g/cup) Butter (227g/cup) Cocoa Powder (90g/cup) Honey (340g/cup) Chocolate Chips (170g/cup)

Frequently Asked Questions

How many grams is 1 cup of rolled oats?
1 cup of old-fashioned rolled oats weighs 90 grams (3.17 oz).
How many cups is 100g of rolled oats?
100 grams of rolled oats is roughly 1.1 cups (1 cup plus 1.5 tablespoons).

Related Calculators

How this is calculated: This tool uses standard, well-established formulas for cooking & kitchen calculations. Results are estimates for informational and planning purposes — always double-check figures for anything with real-world consequences (e.g. ordering materials or submitting grades).